Hall effect in the accumulation layers on the surface of organic semiconductors

Details Hall effect in the accumulation layers on the surface of organic semiconductors Hall effect in the accumulation layers on the surface of organic semiconductors

2005-07-30

arxiv.org/abs/cond-mat/0508006v1

Physics

Condensed Matter

Materials Science

11 pages

Scientific paper

10.1103/PhysRevLett.95.226601

We have observed the Hall effect in the field-induced accumulation layer on the surface of small-molecule organic semiconductor. The Hall mobility mu_H increases with decreasing temperature in both the intrinsic (high-temperature) and trap-dominated (low-temperature) conduction regimes. In the intrinsic regime, the density of mobile field-induced charge carriers extracted from the Hall measurements, n_H, coincides with the density n calculated using the gate-channel capacitance, and becomes smaller than n in the trap-dominated regime. The Hall data are consistent with the diffusive band-like motion of field-induced charge carriers between the trapping events.

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